College Physics
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ISBN: 9781305952300
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Publisher: Cengage Learning
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Transcribed Image Text:A metal has a work function of 3.1eV and is illuminated by light of wavelength A = 320 nm.
What is the maximum velocity of the photoelectrons emitted?
Select one:
а.
2.7 x 106 m/s
b. 3.2 x 10' m/s
С.
5.9 x 105 m/s
O d. 5.24 x 105 m/s
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- Lithium has a work function of 2.51 eV. What is the maximum kinetic energy of the photoelectrons if 9.7 x 10¹4 Hz radiation is incident upon it?arrow_forwardA metal surface has a photoelectric cutoff wavelength of 325.6 nm. It is illuminated with light of wavelength 259.8 nm. What is the stopping potential?arrow_forwardUV radiation having a wavelength of 146 nm falls on gold metal, to which electrons are bound by 4.82 eV. What is the maximum velocity of the ejected photoelectrons? No need to use relativistic formulas in this case.arrow_forward
- The work function of a material is 6 eV what is the potential difference that is required to stop the fastest photoelectrons emitted by a surface when electromagnetic radiation of frequency 4.5 * 10 ^ 15 * Hz is allowed to fall on it.arrow_forwardFor light with a wavelength of 350 nm and with an intensity of /= 10-8 W/m², what is the number of photons/(m²s) in the light beam?arrow_forwardWhen ultraviolet light with a wavelength of 420 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.1 eV. (a) What is the stopping potential for these photoelectrons with this Kmax? (b) What is the threshold frequency for this metal? (c) What is the maximum kinetic energy of photoelectrons when light of wavelength 314 nm falls on the same surface?arrow_forward
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